"IPM Guidelines". UMassAmherst: Integrated Pest Management, Agriculture and Landscape Program. 2009. Diarsipkan dari versi asli tanggal 2012-03-12. Diakses tanggal 13 March 2012.
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"IPM Guidelines". UMassAmherst: Integrated Pest Management, Agriculture and Landscape Program. 2009. Diarsipkan dari versi asli tanggal 2012-03-12. Diakses tanggal 13 March 2012.